CN214408622U

CN214408622U - Device for nitrogen tetroxide accelerated corrosion test

Info

Publication number: CN214408622U
Application number: CN202023137583.2U
Authority: CN
Inventors: 金国锋; 黄智勇; 高敏娜; 李茸; 贾瑛; 吕晓猛; 田干; 孙伟伟; 沈可可
Original assignee: Rocket Force University of Engineering of PLA
Current assignee: Rocket Force University of Engineering of PLA
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-10-15
Anticipated expiration: 2030-12-23

Abstract

The utility model provides a device for nitrogen tetroxide accelerated corrosion test, be provided with transparent reactor in the pressure gauge, be provided with 2 ~ 4 visual windows along the circumferencial direction on the pressure gauge lateral wall, the matching is provided with the pressure lid on the pressure gauge, the pressure is covered and is provided with the extension pipe that is linked together with the reactor, the pressure-measuring pipe, the material pipe, the pressure regulating pipe, the material pipe is located one of outer the reactor and is served and be provided with first valve, be located one of reactor and serve and be provided with the material hose, the material hose leads to the bottom in the reactor, be provided with the second valve on the pressure regulating pipe, be provided with the manometer on the pressure measuring pipe. The utility model has the advantages of small volume, safe operation and convenient use.

Description

Device for nitrogen tetroxide accelerated corrosion test

Technical Field

The utility model belongs to the technical field of experimental apparatus, concretely relates to a device for nitrogen tetroxide accelerated corrosion test.

Background

Dinitrogen tetroxide is used as an oxidant of the most commonly used bipropellants in modern military and aviation industries, and is widely applied to various occasions such as satellite launching, military attack and the like. The dinitrogen tetroxide pure liquid is colorless, and the dinitrogen tetroxide has strong oxidizing property, and can be combusted or even exploded when contacting with reducing substances such as carbon, phosphorus, most organic compounds and the like. The oxidant dinitrogen tetroxide used by the propellant generally needs to be stored in a sealed mode, dinitrogen tetroxide is corrosive and easy to absorb water, and metal parts are often corroded and damaged due to the strong corrosivity of the dinitrogen tetroxide, so that the dinitrogen tetroxide corrosion resistance of the metal is an important experimental project in a propellant laboratory, and meanwhile, the dinitrogen tetroxide corrosion resistance of the metal has important guiding significance for the selection of materials and the structural design in military application.

The use of the reaction kettle relates to aspects of modern industry, chemical product manufacture, medicine manufacture, petroleum refining and the like. The design and manufacture of foreign reaction kettles are developed from the last 40 th century, and gradually integrate a plurality of subjects such as automation control, information technology and the like, and are continuously developed towards the direction of integration, intellectualization and networking, and the field of the reaction kettles in China is rapidly developed in the last 80 th century. Aiming at small reaction kettles used in laboratories, reaction kettles meeting common conditions are designed on the market, and the reaction kettles have different levels of sealing performance, functions, corrosion resistance, material compatibility, pressure resistance and the like. For a special test reaction device for the metal soaking corrosion reaction of the dinitrogen tetroxide, a reaction kettle made of a silica glass material with good material compatibility is generally used in a laboratory, but the reaction kettle cannot simultaneously meet the requirements of convenience, tightness and pressure resistance for filling the dinitrogen tetroxide, can generate a large amount of dinitrogen tetroxide gas in the operation process, and has the defects of high operation risk and the like. The reaction kettle which has special requirements for the special medium at home and abroad does not have universal market requirements, and the design and manufacture of the reaction kettle are usually designed and manufactured by manufacturing companies according to the requirements to meet different functional requirements of the reaction kettle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a reasonable in design, simple structure, convenient operation, the good device that is used for nitrogen tetroxide accelerated corrosion test of security is provided.

The technical scheme for solving the technical problems is as follows: the utility model provides a device for nitrogen tetroxide accelerated corrosion test, be provided with transparent reactor in the pressure gauge, be provided with 2 ~ 4 visual window an along the circumferencial direction on the pressure gauge lateral wall, the matching is provided with the pressure lid on the pressure gauge, the pressure is covered and is provided with the extension pipe that is linked together with the reactor, the pressure-measuring pipe, the material pipe, the pressure regulating pipe, the material pipe is located one of outer the reactor and is served and be provided with first valve, be located one of reactor and serve and be provided with the material hose, the material hose leads to the reactor bottom in, be provided with the second valve on the pressure regulating pipe, be provided with the manometer on the pressure measuring pipe.

As a preferred technical scheme, the pressure cover is disc-shaped, the outer diameter of the pressure cover is 160-180 mm, an expanded pipe mounting hole is machined in the center of the pressure cover, the aperture of the expanded pipe mounting hole is 0.2-0.4 times of the outer diameter of the pressure cover, pressure measuring pipe mounting holes, material pipe mounting holes and pressure regulating pipe mounting holes which are uniformly distributed and have the same aperture are machined in the pressure cover on the outer side of the expanded pipe mounting hole along the circumferential direction, the aperture of the pressure measuring pipe mounting holes is 0.05-0.06 times of the outer diameter of the pressure cover, the axes of the expanded pipe mounting holes, the axes of the pressure measuring pipe mounting holes and the axes of the pressure regulating pipe mounting holes are parallel to the axis of the pressure cover, and the included angle between the axis of the material pipe mounting holes and the axis of the pressure cover is 50-90 degrees.

As a preferred technical scheme, the reactor has a structure that a cylindrical barrel is integrally connected to a hemispherical shell at the bottom, and the reactor is made of quartz glass.

As a preferred technical scheme, the inner diameter of the reactor is 70-120 mm, the wall thickness is 4-7 mm, and the height is 140-160 mm.

As a preferable technical scheme, a sealing ring is arranged between the reactor and the pressure cover.

As a preferable technical scheme, a pressure pad is arranged between the pressure reactor and the reactor.

As a preferred technical scheme, the pressure gauge, the pressure cover, the pressure measuring pipe, the material pipe and the pressure regulating pipe are all made of stainless steel, and the expansion pipe is made of stainless steel or polytetrafluoroethylene.

As a preferred technical scheme, the shape of the visible window is oblong, the length of the visible window is 130-155 mm, the width of the visible window is 20-25 mm, and the distance between the lower end of the visible window and the bottom of the inner cavity of the pressure device is 8-15 mm.

As a preferred technical scheme, the visible window is a quartz glass window attached to the reactor.

As a preferable technical scheme, a safety valve is arranged on the expansion pipe, and a waste liquid discharging pipe is arranged at the outer end part of the expansion pipe.

The utility model has the advantages as follows:

the utility model adopts the pressure device to be internally provided with the transparent reactor, the material of the reactor is quartz glass, and the reactor has the advantages of extremely low thermal expansion coefficient, excellent chemical stability, good compatibility with dinitrogen tetroxide, better mechanical property, non-conductivity and the like; the pressure pad is arranged between the pressure reactor and the reactor, and the sealing ring is arranged between the reactor and the pressure cover, so that the sealing performance is good, and the sealing requirement of a long-time sealing corrosion test can be met; the utility model discloses a change and extend the pipe applicable in the experiment of difference, the utility model discloses still have operation safety, convenient to use's advantage.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic view of the installation of the pressure regulating pipe 7, the pressure measuring pipe 8, the expanding pipe 10 and the material pipe 11 on the pressure cover 4 in the embodiment 1.

Fig. 3 is a schematic structural diagram of embodiment 4 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, but the present invention is not limited to the following embodiments.

Example 1

In fig. 1 and 2, the device for the dinitrogen tetroxide accelerated corrosion test of the embodiment is formed by connecting a pressure gauge 1, a reactor 2, a waste liquid discharge hose 3, a pressure cover 4, a safety valve 5, a second valve 6, a pressure regulating pipe 7, a pressure measuring pipe 8, a pressure gauge 9, an expansion pipe 10, a material pipe 11, a first valve 12, an O-shaped sealing ring 13, a pressure pad 14 and a material hose 15.

The pressure device 1 is cylindrical and barrel-shaped, the shape of the inner cavity of the pressure device 1 is matched with the shape of the reactor 2, the quartz glass reactor 2 is arranged in the pressure device 1, the pressure device 1 is used for protecting the reactor 2, a pressure pad 14 is arranged between the port of the reactor 2 and the port of the pressure device 1, the reactor 2 is structurally characterized in that a cylindrical barrel is integrally formed on a bottom hemispherical shell, the inner diameter of the reactor 2 is 100mm, the wall thickness is 5mm, the height is 150mm, a groove is formed in the upper end face of the reactor 2, an O-shaped sealing ring 13 is arranged in the groove, 2 visible windows a are formed in the side wall of the pressure device 1 along the circumferential direction, the visible windows a are long round, the length is 144mm, the width is 24mm, the distance between the lower end of the visible windows a and the bottom of the inner cavity of the pressure device 1 is 10mm, the visible windows a are quartz glass windows attached to the reactor 2, and are fixed on the pressure device 1 by gluing, the pressure cap 4 is matched and installed on the pressure device 1, the outer diameter of the pressure cap 4 is 170mm, the pressure cap 4 is connected with the pressure device 1 through a thread fastening connecting piece, the pressure cap 4 is sealed with the reactor 2 through an O-shaped sealing ring 13, an expanding pipe installation hole is processed at the central position of the pressure cap 4, the aperture of the expanding pipe installation hole is 0.3 time of the outer diameter of the pressure cap 4, pressure measuring pipe installation holes, material pipe installation holes and pressure regulating pipe installation holes which are uniformly distributed and have the same aperture are processed on the pressure cap 4 along the circumferential direction outside the expanding pipe installation hole, the aperture of the pressure measuring pipe installation hole is 0.055 time of the outer diameter of the pressure cap 4, the axes of the expanding pipe installation hole, the pressure measuring pipe installation holes and the pressure regulating pipe installation holes are parallel to the axis of the pressure cap 4, the included angle between the axis of the material pipe installation hole and the axis of the pressure cap 4 is 75 degrees, and the material pipe 11 can be conveniently connected with a material hose 15 and then directly communicated to the bottom of the reactor, an expansion pipe 10 is connected in a mounting hole of the expansion pipe in a threaded manner, the expansion pipe 10 is communicated with a reactor 2, a safety valve 5 is installed on the expansion pipe 10, a waste liquid discharge hose 3 is connected to the outer end of the expansion pipe 10, the end of the waste liquid discharge hose 3 is communicated with a waste liquid recovery pool, a pressure measuring pipe 8 is installed in the mounting hole of the pressure measuring pipe in a sealing manner, the pressure measuring pipe 8 is communicated with the reactor 2, the outer end port of the pressure measuring pipe 8 is closed, a pressure gauge 9 is installed on the pressure measuring pipe 8 and used for monitoring the pressure in the reactor 2 in real time, a material pipe 11 is installed in the mounting hole of the material pipe in a sealing manner, one end of the material pipe 11, which is positioned in the reactor 2, is connected with a corrosion-resistant material hose 15, the material hose 15 is communicated with the inner bottom of the reactor 2, a first valve 12 is installed on one end of the material pipe 11, which is positioned outside the reactor 2, the material pipe 11 is used for injecting or transferring out dinitrogen tetroxide material, and a pressure regulating pipe 7 is installed in the mounting hole in a sealing manner, pressure regulating pipe 7 is linked together with reactor 2, install second valve 6 on the pressure regulating pipe 7, pressure regulating pipe 7 is used for linking to each other with outside pressurization equipment, thereby provide 2 interior malleation or negative pressure environment of reactor, and the environment of malleation or negative pressure will be the power of nitrogen tetroxide material notes and roll-out process, the pressure gauge 1 of this embodiment, pressure lid 4, pressure-measuring pipe 8, material pipe 11, extend pipe 10, the material of pressure regulating pipe 7 is the stainless steel, material hose 15 and waste liquid discharge hose 3 are polytetrafluoroethylene pipe.

Example 2

In the embodiment, a quartz glass reactor 2 is installed in a pressure vessel 1, the inner diameter of the reactor 2 is 70mm, the wall thickness is 4mm, the height is 140mm, a groove is processed on the upper end surface of the reactor 2, an O-shaped sealing ring 13 is installed in the groove, 3 visible windows a are processed on the side wall of the pressure vessel 1 along the circumferential direction, the visible windows a are long round, the length is 130mm, the width is 20mm, the distance between the lower end of the visible windows a and the bottom of the inner cavity of the pressure vessel 1 is 8mm, the visible windows a are quartz glass windows attached to the reactor 2, the quartz glass windows are fixed on the pressure vessel 1 by gluing, a pressure cover 4 is installed on the pressure vessel 1 in a matching manner, the pressure cover 4 is disc-shaped, the outer diameter is 160mm, the pressure cover 4 is connected with the pressure vessel 1 by a threaded fastening connecting piece, the pressure cover 4 is sealed with the reactor 2 by the O-shaped sealing ring 13, an expanding pipe installation hole is processed at the center of the pressure cover 4, the aperture of the expanded pipe mounting hole is 0.2 times of the outer diameter of the pressure cover 4, the pressure measuring pipe mounting holes, the material pipe mounting hole and the pressure regulating pipe mounting hole which are uniformly distributed and have the same aperture are machined in the pressure cover 4 on the outer side of the expanded pipe mounting hole along the circumferential direction, the aperture of the pressure measuring pipe mounting hole is 0.05 times of the outer diameter of the pressure cover 4, the axes of the expanded pipe mounting hole, the pressure measuring pipe mounting hole and the pressure regulating pipe mounting hole are parallel to the axis of the pressure cover 4, and the included angle between the axis of the material pipe mounting hole and the axis of the pressure cover 4 is 50 degrees. The other components and the connection relationship of the components are the same as those in embodiment 1.

Example 3

In the embodiment, a quartz glass reactor 2 is installed in a pressure reactor 1, the inner diameter of the reactor 2 is 120mm, the wall thickness is 7mm, the height is 160mm, a groove is processed on the upper end surface of the reactor 2, an O-shaped sealing ring 13 is installed in the groove, 4 visible windows a are processed on the side wall of the pressure reactor 1 along the circumferential direction, the visible windows a are long round, the length is 155mm, the width is 25mm, the distance between the lower end of the visible windows a and the bottom of the inner cavity of the pressure reactor 1 is 15mm, the visible windows a are quartz glass windows attached to the reactor 2, the quartz glass windows are fixed on the pressure reactor 1 by gluing, a pressure cover 4 is installed on the pressure reactor 1 in a matching manner, the pressure cover 4 is disc-shaped, the outer diameter is 180mm, the pressure cover 4 is connected with the pressure reactor 1 by a threaded fastening connecting piece, the pressure cover 4 is sealed with the reactor 2 by the O-shaped sealing ring 13, an expanding pipe installation hole is processed at the center position of the pressure cover 4, the aperture of the mounting hole of the expanded pipe 10 is 0.4 times of the outer diameter of the pressure cover 4, the pressure measuring pipe mounting holes, the material pipe mounting holes and the pressure regulating pipe mounting holes which are uniformly distributed and have the same aperture are machined in the pressure cover 4 outside the expanded pipe mounting hole along the circumferential direction, the aperture of the pressure measuring pipe mounting holes is 0.06 times of the outer diameter of the pressure cover 4, the axes of the expanded pipe mounting holes, the pressure measuring pipe mounting holes and the pressure regulating pipe mounting holes are parallel to the axis of the pressure cover 4, and the included angle between the axis of the material pipe mounting holes and the axis of the pressure cover 4 is 90 degrees. The other components and the connection relationship of the components are the same as those in embodiment 1.

Example 4

In fig. 3, the device for the dinitrogen tetroxide accelerated corrosion test of the embodiment is formed by connecting a pressure gauge 1, a reactor 2, a pressure cover 4, a second valve 6, a pressure regulating pipe 7, a pressure measuring pipe 8, a pressure gauge 9, an expansion pipe 10, a material pipe 11, a first valve 12, an O-shaped sealing ring 13, a pressure pad 14 and a material hose 15, and is used as dinitrogen tetroxide propellant electrochemical accelerated corrosion metal test equipment.

The pressure device 1 is internally provided with a quartz glass reactor 2, the pressure device 1 is used for protecting the reactor 2, a pressure pad 14 is arranged between the port of the reactor 2 and the port of the pressure device 1, the reactor 2 is structurally characterized in that a cylindrical barrel is integrally processed on a hemispherical shell at the bottom, the inner diameter of the reactor 2 is 100mm, the wall thickness is 5mm, the height is 150mm, a groove is processed on the upper end surface of the reactor 2, an O-shaped sealing ring 13 is arranged in the groove, 2 visual windows a are processed on the side wall of the pressure device 1 along the circumferential direction, the visual windows a are long round, the length is 144mm, the width is 24mm, the distance between the lower end of the visual window a and the bottom of an inner cavity of the pressure device 1 is 10mm, the visual windows a are quartz glass windows attached to the reactor 2, and are fixed on the pressure device 1 through adhesion and used for observing the test conditions in the reactor 2, the pressure cover 4 is arranged on the pressure device 1 in a matching way, the outer diameter of the pressure cover 4 is 170mm, the pressure cover 4 is connected with the pressure device 1 through a thread fastening connecting piece, the pressure cover 4 is sealed with the reactor 2 through an O-shaped sealing ring 13, an expanding pipe mounting hole is processed at the central position of the pressure cover 4, the aperture of the expanding pipe mounting hole is 0.3 times of the outer diameter of the pressure cover 4, pressure measuring pipe mounting holes, material pipe mounting holes and pressure regulating pipe mounting holes which are uniformly distributed and have the same aperture are processed on the pressure cover 4 along the circumferential direction outside the expanding pipe mounting hole, the aperture of the pressure measuring pipe mounting hole is 0.055 times of the outer diameter of the pressure cover 4, the axes of the expanding pipe mounting hole, the pressure measuring pipe mounting holes and the pressure regulating pipe mounting holes are parallel to the axis of the pressure cover 4, the included angle between the axis of the material pipe mounting hole and the axis of the pressure cover 4 is 75 degrees, an expanding pipe 10 is connected in the expanding pipe mounting hole through a thread, the expanding pipe 10 is a polytetrafluoroethylene pipe, the device is used for installing an electrolytic cell, a pressure measuring pipe 8 is installed in a pressure measuring pipe installation hole in a sealing mode, the pressure measuring pipe 8 is communicated with a reactor 2, the port of the outer end of the pressure measuring pipe 8 is closed, a pressure gauge 9 is installed on the pressure measuring pipe 8 and used for monitoring the pressure in the reactor 2 in real time, a material pipe 11 is installed in the material pipe installation hole in a sealing mode, one end, located in the reactor 2, of the material pipe 11 is connected with a corrosion-resistant material hose 15, the material hose 15 is communicated with the bottom in the reactor 2, a first valve 12 is installed on one end, located outside the reactor 2, of the material pipe 11, the material pipe 11 is used for filling or transferring out a dinitrogen tetroxide material, a pressure regulating pipe 7 is installed in the pressure regulating pipe installation hole in a sealing mode, the pressure regulating pipe 7 is communicated with the reactor 2, a second valve 6 is installed on the pressure regulating pipe 7, the pressure regulating pipe 7 is used for being connected with external pressurizing equipment, so that a positive pressure or negative pressure environment in the reactor 2 is provided, and the positive pressure or negative pressure environment is the power of the dinitrogen tetroxide material filling and transferring-out process, the material of the pressure gauge 1, the pressure cover 4, the pressure measuring pipe 8, the material pipe 11 and the pressure regulating pipe 7 of the embodiment is stainless steel, and the material hose 15 is a polytetrafluoroethylene pipe.

Claims

1. A device for nitrous oxide accelerated corrosion test is characterized in that: be provided with transparent reactor (2) in pressure gauge (1), be provided with 2 ~ 4 visual windows (a) along the circumferencial direction on pressure gauge (1) lateral wall, the matching is provided with pressure lid (4) on pressure gauge (1), be provided with expansion pipe (10) that are linked together with reactor (2) on pressure lid (4), pressure-measuring pipe (8), material pipe (11), pressure-regulating pipe (7), material pipe (11) are located one of reactor (2) outer and are served and be provided with first valve (12), one of being located reactor (2) is served and is provided with material hose (15), material hose (15) lead to reactor (2) bottom in, be provided with second valve (6) on pressure-regulating pipe (7), be provided with manometer (9) on pressure-measuring pipe (8).

2. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: the pressure cover (4) is disc-shaped, the outer diameter of the pressure cover is 160-180 mm, an expanded pipe mounting hole is machined in the center of the pressure cover (4), the aperture of the expanded pipe mounting hole is 0.2-0.4 times of the outer diameter of the pressure cover (4), pressure measuring pipe mounting holes, material pipe mounting holes and pressure regulating pipe mounting holes which are uniformly distributed and have the same aperture are machined in the pressure cover (4) outside the expanded pipe mounting hole along the circumferential direction, the aperture of the pressure measuring pipe mounting holes is 0.05-0.06 times of the outer diameter of the pressure cover (4), the axes of the expanded pipe mounting holes, the pressure measuring pipe mounting holes and the pressure regulating pipe mounting holes are parallel to the axis of the pressure cover (4), and the included angle between the axis of the material pipe mounting holes and the axis of the pressure cover (4) is 50-90 degrees.

3. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: the reactor (2) is structurally characterized in that a cylindrical barrel is integrally arranged on a hemispherical shell at the bottom, and the reactor (2) is made of quartz glass.

4. The apparatus for nitrous oxide accelerated corrosion testing of claim 3, wherein: the inner diameter of the reactor (2) is 70-120 mm, the wall thickness is 4-7 mm, and the height is 140-160 mm.

5. The apparatus for nitrous oxide accelerated corrosion testing according to claim 1 or 3, characterized in that: and a sealing ring is arranged between the reactor (2) and the pressure cover (4).

6. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: a pressure pad (14) is arranged between the pressure device (1) and the reactor (2).

7. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: the pressure gauge (1), the pressure cover (4), the pressure measuring pipe (8), the material pipe (11) and the pressure regulating pipe (7) are all made of stainless steel, and the expansion pipe (10) is made of stainless steel or polytetrafluoroethylene.

8. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: the shape of the visible window (a) is oblong, the length is 130-155 mm, the width is 20-25 mm, and the distance between the lower end of the visible window (a) and the bottom of the inner cavity of the pressure device (1) is 8-15 mm.

9. The apparatus for nitrous oxide accelerated corrosion testing according to claim 1 or 8, characterized in that: the visible window (a) is a quartz glass window attached to the reactor (2).

10. The apparatus for nitrous oxide accelerated corrosion testing of claim 1, wherein: the expansion pipe (10) is provided with a safety valve (5), and the outer end part of the expansion pipe (10) is provided with a waste liquid discharging pipe.